Body Fat Calculator (Navy Method)
Estimate your body fat percentage using tape measurements and the US Navy formula — no calipers or scans needed.
Estimated body fat
16.9%
Category
Fit
Measure with a relaxed waist (at navel) and neck below the larynx. All measurements in cm.
Formula
Men: 495 ÷ (1.0324 − 0.19077·log(waist−neck) + 0.15456·log(height)) − 450How to use the Body Fat Calculator (Navy Method)
- 1Enter height and neck circumference
- 2Add waist (men) or waist and hip (women)
- 3Read your estimated body fat percentage and category
Frequently Asked Questions
How accurate is the Navy method?
It typically lands within 3–4% of DEXA scans — good for tracking trends at home, though not clinical-grade.
What is a healthy body fat percentage?
Rough guides: men 10–20%, women 18–28% for most adults. Athletes run lower; ranges shift slightly with age.